Carrier 38AD028- Installation Manual

9 Table 4A - Refrigerant Piping Sizes LENGTH OF INTERCONNECTING PIPING, FT (M) 0-15 15-25 25-50 50-75 75-100 UNIT (0-4.5) (4.5-7.5) (7.5-15) (15-23) (23-30) 38AKS Line Size (in. OD) L S L S L S L S L S 016 1/2 1 3/8 5/8 1 3/8 5/8 1 5/8 7/8 1 5/8 7/8 2 1/8 024 5/8 1 5/8 5/8 1 5/8 7/8 1 5/8 7/8 2 1/8 ...

10 INSTALL FILTER DRIER(S), MOISTURE INDICATOR(S) AND SOLENOID VALVE(S) – The illustrations below are the standard piping connections. Complete the refrigerant piping from indoor unit to outdoor unit before opening the liquid and suction lines at the outdoor unit. Fig. 5– Location of Sight Glass, Fi...

11 11 NOTE: 38AKS024, 034 & 044 has a fusible plug in the liquid line. Fig. 8 – Main power Supply Wiring Fig. 7 – Location of Fusible Plug (38AKS) Table 5A - Electrical Data (3 Ph/60 Hz) UNIT COMPR FAN MOTORS (Single Phase) UNIT Volts MOCP FLA(ea) 38AKS Model Supplied* MCA ICF C.B. RLA LRA Total...

12 12 Table 5B - Electrical Data (3 Ph/60 Hz) UNIT COMPRESSOR FAN MOTORS POWER SUPPLY UNIT Nominal Voltage 38AKS Voltage Range* FLA RLA LRA Qty FLA MCA ICF MOCP Min Max (ea) (C.B.) 208-230 187 254 102.2 89.8 446 5.5 124.6 452.2 200 028 460 414 508 49.8 43.6 223 2.75 60.7 226.1 100 208-230 187 254 11...

13 Leak Test and Dehydration – Leak test the entire refrigerant system using soap bubbles and/or an electronic leak detector. Turn On Crankcase Heater – Turn on crankcase heater for 24 hours before starting the unit to be sure all the refrigerant is out of the oil. To energize the crankcase heater, ...

14 Adjust Refrigerant Charge NOTE: Actual start-up and all refrigerant charge modifications should be done only under supervision of a qualified refrigerant mechanic. With all fans operating , adjust the refrigerant charge. Measure pressure at the liquid line service valve, being sure Schrader depre...

20 When installed, a field supplied solenoid shuts of the liquid line to prevent refrigerant migration back to the compressor during the off cycle. SERVICE Capacity Control – For compressors equipped with an unloader, 2 cylinders are unloaded to provide capacity control. The unloader maybe suction-p...

21 COMPRESSOR OVERTEMPERATURE PROTECTION (IP) – A thermostat installed in compressor motor winding reacts to excessively high winding temperatures and shuts off the compressor. (This is applicable only for 06D Compressor, not on 06E.) Discharge Temp. Sensor is on Cylinder Head for 06E, externally. T...

23 TROUBLESHOOTING PROBLEM SOLUTION COMPRESSOR DOES NOT RUNContactor Open 1. Power off. 1. Restore power. 2. Fuses blown in field power circuit. 2. After finding cause and correcting, replace with correct size fuse. 3. No control power. 3. Check control circuit breaker; reset if tripped or replace i...

25 START-UP CHECKLIST FOR 38AKS CONDENSING UNIT (MUST BE SENT TO CCAC UPON COMPLETION) A. PRELIMINARY INFORMATION Job Name : Location : Installing Contractor : Distributor : Start-up performed by : Start-up Date : EQUIPMENT: Model : Serial No. : COMPRESSOR: Model : Serial No. : Motor No. : Volts : R...

26 MAXIMUM DEVIATION FROM AVERAGE VOLTAGE = VVOLTAGE IMBALANCE = (Max. deviation) x 100 = %VOLTAGE IMBALANCE Average Voltage If over 2% Voltage Imbalance, do not attempt to start the unit! Call local power company for assistance.Assure that incoming power supply voltage to unit is within the range o...